We had one of the first houses in the Eugene (OR) subdivision where I grew up. The next lot up the hill had just had the trees cut down, so us neighborhood kids made tunnels through the fallen trees. We called it "the rough country" and had picnics under the branches.
If we walked another block or two up the hill, we were out in the uncut forest where we could explore everywhere, collect wild mushrooms and pine cones and what have you.
The lot just down the hill from ours had a house under construction, complete with a bomb shelter! Of course, this being the late 1950s, we had two main worries: getting blown up in a nuclear war, or polio.
But we'd gotten vaccinated, so the nuclear bomb was our biggest concern. We spent a lot of time in the bomb shelter, brought cookies and snacks, and conducted our neighborhood business meetings there.